Apparatus for the manufacture of artificial silk



' March 11, 1941 w. BAKKER APPARATUS FOR THE MANUFACTURE OF ARTiFICIAl-I SILK Filed Oct. 15, 1937 2 Sheets-Shea}:

March 11, 1941. w BAKKER Q 2,234,616

APPARATUS FOR THE MANbFACTURE OF ARTIFICIAL-SILK Filed Oct. 15, 1937 2. Sheets-Sheet 2 Willem fimfir Patented Mar. 11, 1941 APPARATUS roa THE MANUFACTURE OF ARTIFICIAL SILK -Willem Bakker, Arnhem, Netherlands, assignor to American Enka Corporation, Enka, N. 0., a corporation of Delaware Application October 15, 1937, Serial No. 169,317

. In Germany October 30, 1936 4 Claims.

gearing, linkage or other mechanism the stroke of the thread guide is gradually shortened throughout the period of winding, resulting in the production of a wound package having tapered or conical ends.

It is an important object of the present invention to provide an improved form of traversing mechanism of the above character. More particularly. the invention contemplates the provision of a traversingmechanism including a swinging rod carrying the thread guide mechanism, which may include the usual heart-shaped cam androller for imparting swinging movement to the thread guide rod, and control means including an oscillatablemember operated in synchronism with the rotating shaft upon which the bobbin is mounted for shortening the stroke or amplitude of swinging movement of' the thread guide throughout the winding operation. In the preferred form of this invention the control means is advantageously actuated from the same variable speed mechanism as is employed for compensating for the increasing diameter of the bobbin during winding.

Another object of my invention is to provide what diagrammatically with respect thereto the arrangement of the thread guide and its traversk ing mechanism including the control means for shortening the stroke of the thread guide during win 88 Eigure 2 is a plan view of the traversing mech- -anism and the mechanism for actuating the control means in the position it occupies at the beginning of the winding operation; and

Figure 3 is a plan view similar to that of Figure 2, but showing the position of the mechanism for actuating the control means at the conclusion of the winding operation.

Referring in detail to the drawings, in Figure l is shown the frame I of a spinning machine with which is associated a candle filter 2 suitably connected to pipe lines (not shown) for supplying a spinning solution to the candle filter. The spinning solution is forced through the candle filter and a spinneret 3 connected thereto into a precipi- 15 tating bath 4. The newly formed thread 5 extends upwardly and is wound upon a bobbin 6 mounted on one end of a horizontally disposed rotating shaft 1, The shaft 1 is driven in any suitable manner, as by means of a worm 8 mesh- 20 ing witha worm wheel 9 fastened to the shaft 1.

In order to permit proper washing of the artificial silk thread after it has been collected upon the bobbin, it is necessary to impart a crosswise displacement to the thread as it is wound upon the bobbin. Such displacement is effected by the provision of a traversing mechanism including a thread guide 9, through which the thread passes in winding onto the bobbin and being carried upon the end of a thread guide rod I!) connected 30 to and depending from a pendulum shaft l I journaled in a bearing l2. The pendulum shaft is rockable in bearing l2 so as to impart a forward and backward stroke to the thread guide which is located adjacent the bobbin. Rocking movement is imparted to the pendulum shaft through the chain of linkage comprising a lever l3 having one end fastened to the pendulum shaft and a link It pivotally connecting the other end of lever i3 with a slidable rod IS, The slidable rod 0 is supported in a rectangular box member 16 mounted for oscillatory movement about a horizontalaxis upon a pair of hollow trunnions I! supported in bearings l8. The box member I6 is oscillated by means of an arm l9 connected at one end to the box member and carryingat its other end a roller 20 designed to ride upon the periphery of a heart-shaped cam 2| eccentrically mounted upon a shaft 22 which is continuously driven at uniform speed. The lever l3, link l4 and 50 slidable rod l5 form movable parts of a parallelogram through which oscillation of the box member i6 is transmitted to the pendulum shaft II and consequently to the thread guide rod Ill.

The position of the linkage at opposite ends-of I8 this cable extends over a pulley 26 and is -pro-' vided with .a weight 21 tending to drawthe block 23 to the right as indicated in the figures.

The block is provided with an inclined cam slot 23 sloping downwardly from left to right and slidingly received within. this slot is a pin 29 fastened to and extending laterally from the slide rod IS. The slide rod l5 passes through aligned openings having necks 30 formed in opposite sides of the box member and through a suitably provided longitudinal slot in the slide block so as to intersect the axis of oscillation of the box member. A pin 3| secured to the end of slide block 23 opposite its end carrying the pin 24 extends outwardly through the adjacent hollow trunnion ll of the box member and is connected by a flexible cable 32 to one end of an actuator lever 33 which is intermediately pivoted at 34.

The box member l6 and slidable block 23 form components of the control means for the traversing mechanism Just described, which means are operatively connected to and actuated from the compensating mechanism which drives shaft 1 upon which the bobbin is mounted. This compensating mechanism comprises a pair of driving 35 and driven cones 35 and 36, respectively, splined upon parallel shafts 35a and 360, respectively, and connected by a belt 31. The shaft carrying the driving cone is operated from a suitable source of power, not shown (which-may be the 401 samesourceof power as that which rotates shaft 22 carrying the heart-shaped cam 2|), and the shaft upon which the driven cone is mounted is connected through a suitable transmission, 'not shown, to a shaft carrying the worm 8, which 45 latter imparts motion through worm wheel 3 to shafit I carrying the bobbin 6.

Supported for rotation above and intermediate.

the cones 35 and 36 is a screw-threaded shaft 38 upon which a nut 39 suitably held against rota- 50, tion is adapted to travel. The screw-threaded shaft is driven from the same source of power which is employed for rotating the driving cone and the nut 39 isso fashioned as to engage and serve as a shifter for the belt 31. The end of 55 the actuator lever. 33 opposite to its end which is connected by the flexible cable 32 to the pin 3| extends adjacent the nut 39 and is provided with a roller 40 which, under the urge of the weight 21, bears upon the flat end face of the nut. As

the nut travels along the screw-threaded shaft 33, shifting the belt 31 to the right, the actuator lever will be swung from the position shown in Figure 2, corresponding to its location at the beginning of a winding operation, to the position 53 shown in Figure 3, at the conclusion of the wind- -ing period.

- The operation of the traversing mechanism described above results in the winding of the thread upon the :bobbin in the' manner indicated 70 bydotted lines in Figure 1 so as to produce a package having conical ends. As will be apparent from the preceding description, as the thread 5 passes from the spinneret 3 up through the thread guide 8 it will .be evenly laid down upon 75 the rotating bobbin through the reciprocation of thread guide rod III which receives its motion from the heart-shaped cam 2| through the linkage comprising arm l9, box member I6,1slidable rod I'5, link 14, lever 13 and pendulum shaft ll. As the thread builds up upon the bobbin the ro- 5 tary speed thereof must be continuously reduced to compensate for the increasing diameter of the thread package in view ofthe constant rate of supply of the thread by the spinneret 3. This is accomplished by means .of the variable speed 10 driving mechanism representedby the cones 35 and 36 and connecting belt 31 indicated in' Figures 2 and 3. In order to control the winding of the thread so as to produce a thread package having conical ends, the full stroke movement. normally imparted to the thread guide through rotation of the heart-shaped cam must be gradually shortened throughout the winding interval. This is accomplished by the control means including the slidable block 23 and the actuator 20 lever 33. As the belt shifting nut 39 slowly moves to the right (Figures 2 and '3), the actuator lever, which is yieldably held in contact with the nut under the urge of weight 21, pulls the slide block to the left, it being understood that the 5 slide block while free to slid-e within the box member is non-rotatable with respect thereto.

This causes the pin 29 extending througlr'the inclined cam slot 28 in the slide block to gradually move downwardly, that is, in a direction 30 such as to retract the slidable rod I5 and shortening the length of the lever arm of the slidable rod measured from the axis of rotation of the box member upon its trunnions I] to the point of pivotal connection of the slide rod with link 85 I4. Since the throw or are of swing of the end of the slide rod is thus constantly and gradually diminished, the motion imparted to the thread guide rod ill will be correspondingly decreased, thus shortening the stroke of the thread guide 9. 40

It will be readily apparent that various changes in arrangement and design may be made in the traversing mechanism described above without departing from the spirit of the invention. For example, instead of employing a straight slot as indicated in the preferred form of the invention described above, in which the stroke of the thread guide is uniformly decreased throughout the winding period, a curved or an angular slot may be substituted to vary the rate of decrease of the stroke, as for example to more slowly shorten the stroke at the beginning of the winding period. Also other means than those shown for imparting movement to the box member may be adopted. 1

An important advantage of the invention resides in the adaptability of the control means to artificial silk spinning machines now in common use, since 'it is unnecessary to change the con struction or arrangement of the heart-shaped cam relative to its driving mechanism. Moreover, substantially the same linkage as is now generally employed in such spinning machines for actuating the thread guide may be preserved. B5

What I claim is:

1. -A winding mechanism for artificial silk thread and the like comprising a bobbin, means for operating the bobbin at variable speed, a thread guide arranged adjacent the bobbin, means for effecting an oscillatory movement of the thread guide along the axis of the bobbin, means for gradually reducing the stroke of said oscillatory movement including a'zbox mounted for oscillation about anaxis, said thread guide oscillating means being also operable to oscillate box, said means acting to vary the distance between th connection of said linkage to said rod and the axis of oscillation of said'rod according to the length of stroke desired to be imparted to the thread guide, and means for moving said cam member longitudinally with respect to the box." said means being associated with; the bobbin opcrating means whereby variation ,in the speed oi! rotation of the bobbin and variation in the length of stroke of the thread guide may be efiected simultaneously.

- means for gradually reducing the stroke of said 2. A winding mechanism for artificial silk thread andthe like comprising a bobbin, means for operating the bobbin at variable speed, a.

thread guide arranged adjacent the bobbin,-

means for efl'ecting an oscillatory movement of the thread guide along the axis of the bobbin,

oscillatory movement including a member mounted for oscillation about an axis, said thread guide oscillating means being also operable to oscillate said member, linkage connected to the thread guide having'a slidable rod connected to its other end'and said rod being oscillatable with said member about the same axis as that of the member, a cam mounted for movement along the axis of oscillation of the member, means on said transversely with respect to the member, said means acting to vary the distance between the connection of said linkage to saidrod and the axis of oscillation of said rod according to the length of stroke desired to be imparted to the thread guide, and means for moving said cam longitudinally with respect to the member, said means being associated with the bobbin operating means whereby the speed of rotation of the bobbin and the length of stroke of the thread guide may be varied simultaneously.

3. A winding mechanism for artificial silk thread and the like comprising a bobbin, means I for operating the bobbin, means for varying the movable parallel'sections one of which is connected to the threadguide, a mounting for supporting the composite lever for oscillatory movement, means for, relatively moving the sections oi \the composite lever for gradually changing the effective length thereof and resultantly to effect a gradual reduction of the stroke of the thread guide across the bobbin, said means for relatively moving said sections being propelled by the bob bin operating speed varying means whereby the speed of rotation of the bobbin and the length of. stroke of the thread guide are varied simultaneously.

4. A winding mechanism for artificial silk thread and the like comprisingra bobbin, 8. bobbin driving and speed change mechanism in.- cluding a belt shifting means'tor driving the bobbinat varying speeds, a thread guide arranged 25 adjacent the bobbin for directing the threadonito the same, means/tor operating. the thread guide and for gradually changing the length of the stroke thereod including an oscillatory member, means for oscillating said oscillatory member, "a slidable rod having oneend connected with the thread guide, said, rod being mounted for. oscillation with and for sliding lateral movement with respect to the oscillatory member, a, cam member mounted within the oscillatory-member, means on said slidable rod coacting ,with the cam member so that movement of the cam member causes sliding movement of the slidable rod to cause that end 0 the slidable rod which is connected with the bread guide to move toward the oscillatory member, and means actuated by the belt shitting means for automatically so moving the cam member and thereby efl'ecting the moving of the slidable rod with the resultant shortening of the stroke of the thread guide, said means actuated by the belt shifting means comprising a pivoted lever connected with'the cam member and with the belt-shitting means.

BAKKER. 

